Lung swim test
The lung swimming test , also known as the Schreyer swimming test, is a forensic medical procedure to check stillbirths . The buoyancy is lungs of newborn checked to by whether the lung has ever breathed or not observed.
The lungs autopsied from the thorax are placed in water and observed to see whether they sink or float. If the lungs are swimming, they already contain air in the alveoli and have breathed. The non-ventilated lungs of stillborn infants, however, sink.
history
The lung swimming test was developed in the 17th century by Johannes Schreyer , a German physicist .